在我对自定义相机的应用要求中,因此开发了一个,到此为止,一切正常,也可以正常拍摄照片,但是当我使用三星 Galaxy ace android 手机(2.3)在横向模式下拍照时还可以,但是在进入纵向模式时, View 图片以 90 度角移动到左侧。正如您在我的代码中看到的那样,我也曾尝试更改表面位置,但没有任何 react 。
这是 Myactivity 类的代码
package com.goutam.test_camera;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.util.Log;
import android.view.Display;
import android.view.Menu;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.widget.FrameLayout;
import android.widget.HorizontalScrollView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;
public class CameraclassActivity extends Activity implements OnClickListener,
PictureCallback {
ImageButton take_picture, retake_button, save_picture, setting_button;
FrameLayout camerapreviewsurface;
Previewclass cameradisplayclass;
ImageView capture_image;
HorizontalScrollView myscrollview;
private Camera myowncamera;
byte[] finalimage;
Bitmap pic_cap_bitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_portrait);
take_picture = (ImageButton) findViewById(R.id.imageButton1);
//
retake_button = (ImageButton) findViewById(R.id.imageButton3);
//
save_picture = (ImageButton) findViewById(R.id.imageButton4);
//
setting_button = (ImageButton) findViewById(R.id.imageButton2);
//
capture_image = (ImageView) findViewById(R.id.imageView1);
//
myscrollview = (HorizontalScrollView) findViewById(R.id.horizontalScrollView1);
//
take_picture.setOnClickListener(this);
retake_button.setOnClickListener(this);
save_picture.setOnClickListener(this);
//
retake_button.setVisibility(View.INVISIBLE);
save_picture.setVisibility(View.INVISIBLE);
setting_button.setVisibility(View.INVISIBLE);
capture_image.setVisibility(View.INVISIBLE);
myscrollview.setVisibility(View.INVISIBLE);
//
myowncamera = Camera.open();
camerapreviewsurface = (FrameLayout) findViewById(R.id.framelayout1);
cameradisplayclass = new Previewclass(this, myowncamera);
camerapreviewsurface.addView(cameradisplayclass);
Log.i("ACTIVITY", "ON CREATE");
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.imageButton1:
takePicture();
break;
}
}
private void takePicture() {
// TODO Auto-generated method stub
take_picture.setVisibility(View.INVISIBLE);
cameradisplayclass.takepicture(this);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// TODO Auto-generated method stub
// setContentView(R.layout.layout_portrait);
super.onConfigurationChanged(newConfig);
}
@Override
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
finalimage = data;
// camera.stopPreview();
this.myowncamera = camera;
retake_button.setVisibility(View.INVISIBLE);
camerapreviewsurface.setVisibility(View.INVISIBLE);
setting_button.setVisibility(View.VISIBLE);
capture_image.setVisibility(View.VISIBLE);
Toast.makeText(getApplicationContext(), "PICTURE TAKEN", 0).show();
new DisplayImageTask().execute(finalimage);
}
private class DisplayImageTask extends AsyncTask<byte[], Void, Bitmap> {
@Override
protected Bitmap doInBackground(byte[]... parameter) {
pic_cap_bitmap = BitmapFactory.decodeByteArray(finalimage, 0,
finalimage.length);
return pic_cap_bitmap;
}
@Override
protected void onPostExecute(Bitmap result) {
capture_image.setImageBitmap(pic_cap_bitmap);
super.onPostExecute(result);
}
@Override
protected void onProgressUpdate(Void... values) {
Toast.makeText(getApplicationContext(), "DISPLAYING IMAGE", 0)
.show();
super.onProgressUpdate(values);
}
}
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// // Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.layout_portrait, menu);
// return true;
@Override
protected void onPause() {
Log.i("ACTIVITY", "ON PAUSE");
System.gc();
this.finish();
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
}
@Override
public void onBackPressed() {
System.gc();
this.finish();
myowncamera.release();
super.onBackPressed();
}
@Override
protected void onDestroy() {
this.finish();
System.gc();
super.onDestroy();
}
}
这是我的表面支架的预览类的代码,用于保存表面 View
package com.goutam.test_camera;
import java.io.IOException;
import android.app.Activity;
import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.util.Log;
import android.view.Display;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.Surface;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;
public class Previewclass extends SurfaceView implements Callback {
private Camera mcamera;
boolean ispreviewing = false;
// WindowManager manager;
SurfaceHolder holder;
public Previewclass(Context context, Camera mycamera) {
super(context);
this.mcamera = mycamera;
// manager=(WindowManager)
// context.getSystemService(Context.WINDOW_SERVICE);
holder = this.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// mcamera=null;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
Log.i("CAMERA", "ON SURFACE CHANGE");
try {
mcamera.setPreviewDisplay(this.holder);
mcamera.startPreview();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// if(ispreviewing==true)
// {
// mcamera.stopPreview();
// }
// Parameters mparameters=mcamera.getParameters();
// Display display=manager.getDefaultDisplay();
// if(display.getRotation()==Surface.ROTATION_0)
// {
// mparameters.setPreviewSize(height, width);
// mcamera.setDisplayOrientation(90);
// }
// if(display.getRotation()==Surface.ROTATION_90)
// {
// mparameters.setPreviewSize(width, height);
// }
// if(display.getRotation() == Surface.ROTATION_180)
// {
// mparameters.setPreviewSize(height, width);
// }
// if(display.getRotation() == Surface.ROTATION_270)
// {
// mparameters.setPreviewSize(width, height);
// mcamera.setDisplayOrientation(180);
// }
// mcamera.setParameters(mparameters);
// previewCamera();
}
// private void previewCamera()
// {
// try {
// mcamera.setPreviewDisplay(this.holder);
// mcamera.startPreview();
// ispreviewing = true;
// } catch (IOException e) {
// Log.e("CAMERA DISPLAY", "ERROR");
// e.printStackTrace();
// }
//
// }
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.i("CAMERA", "ON SURFACE CREATED");
try {
mcamera.setPreviewDisplay(holder);
ispreviewing = true;
mcamera.startPreview();
} catch (IOException e) {
Log.e("CAMERA OPENING", "ERROR");
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("CAMERA", "ON SURFACE DESTROY");
this.mcamera = null;
// this.manager=null;
this.holder = null;
// mcamera.stopPreview();
// this.mcamera.release();
}
public void takepicture(PictureCallback imageCallback) {
mcamera.takePicture(null, null, imageCallback);
}
}
这是我的 androidmanifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.goutam.test_camera"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature
android:name="android.hardware.camera.autofocus"
android:required="false" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.goutam.test_camera.CameraclassActivity"
android:configChanges="orientation|keyboardHidden"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
最佳答案
实际上这是因为,默认情况下,三星 Galaxy Ace 的相机是横向的。因此,如果您将其更改为纵向,它会自动旋转捕获的图像,就像在横向模式下捕获的图像一样。
找到屏幕的方向(使用以下代码)
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
if (savedInstanceState != null)
{
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
{
// your code
}
else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
{
// your code
}
savedInstanceState.getInt("param");
Log.e("on restore saved state",""+savedInstanceState.getInt("param"));
}
}
如果是纵向
旋转图像并保存在 SDCard 中,或者如果您只是在 imageView 中显示它,请旋转并设置为其 BackgroundResource
以下是将其旋转到 90 度的代码,
public static Bitmap rotate(Bitmap b, int degrees)
{
if (degrees != 0 && b != null)
{
Matrix m = new Matrix();
m.setRotate(degrees, (float) b.getWidth() / 2, (float) b.getHeight() / 2);
try {
Bitmap b2 = Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), m, true);
if (b != b2)
{
b.recycle();
b = b2;
}
} catch (OutOfMemoryError ex)
{
throw ex;
}
}
return b;
}
关于android - 三星手机中自定义摄像头的屏幕方向,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/14500244/